Plumber&#39;s torch



June 6, 1933. w. BERNZ ET AL PLUMBER S TORCH Filed Dec. 31, 1930 INVENTORS ATTORNEYS y character Adesignates the fuel reservoir or Patented Junee, 1933 PATENT OFFICE WILLIAM :ennlvz AND :uuvins EDWARD FLITCROFT, or NEWARK, nEW JERSEY,

ASSIGNORS T OTTO BERNZ CO. INC.,

OENEW JERSEY V 1 PLUMBERS ronon Application filed nec ember 31,1930, Serial 505,784.

generating or fuel preheating tube or coil,

whereby the preheating tube can be efi'ectually interiorly cleaned of carbon deposits Without entirely disassembling the burner w head. u u Another object is to provide novel and improved means for cleaning carbon from the interior of the fuel preheating coil of the H general character described, said meansbeing permanently associated with the preheating coil and being operable while the torch is in operation.

Other objects are'to provide in a burner head a novel and improved form of prem heating tube which is essentially U-shaped,

and a novel and improved support for said preheating tube and combination of said support, preheating tube and a burner noz W zle, whereby 'a'conipact and efficient con- A struction is obtained; to provide in such a burner head anovel and mproved construction and combination of a support and a combustion tube, whereby theparts can be easily and quickly assembled and disastain other advantages and results as willbe brought out by the following description. n i 1 Referring to the accompanying drawing, in whichcorrespondingand like parts are designated throughout the several views by the same reference characters, A A

y Figurel is a side elevation of a plumb ers torch embodying our invention;

Figure 2 is a vertical longitudinal sec: tional View through the burner headj FigureSis a transverse vertical sectional view,onthe line 3-3 of Figure 2, and

Figure 4 isa transverse sectional view, 011 the lined-4 of Figure 2. n 1

Figure 5' is a top plan view of aportion of the burner head, parts of which are shown in section. q Specifically describing the illustrated em- 4 1 bodiment of the invention, the reference sembled for cleaning or repaiiyandto ob tank ofa torch which has a handle'B at one side and a fuel supply cpipe C at the top. Upon this fuel supply pipe is mounted a burner head D whichcomprises a supportl, preferably in the form of a casting, having a substantially vertical passage 2 communieating with the fuel supply pipe and with a substantially horizontal passage 3. At one end of the support 1 and in substantial axial alinement with the passage 3 is secured one arm 4 of a substantially U-shaped fuel preheating tube 5 which is disposed in substantially a vertical plane. At the other sideof the support 1 and in the passage 3 is re tatably mounteda rod 6 passing through a gland. 7 outwardly ofthe support, and having fixedly connected to its inner end, as at 8, a helical spring 9 of a diameter lessthan that of the cross-sectional diameter of the preheatingtube'e. To the outer end of this rod 6 is connected a handle 10 by which the rod maybe rotated and reciprocated. Re ciprocation of the rod is limited by a collar 11 agranged in a cap 12 secured to the gland nut l a a At the opposite end of the preheating tube 5 is mounted a burner bodyll3 having a substantially right angular. passage l4-therein,

OF NEWARK, NEW JERSEY, A CORPORATION one end of which communicates with" the block'17 secured in the burner body and having an orifice 18. The burner block l'? is disposed substantially midway between the arms of the preheating tube and in substantially the same plane. The burner body is provided with a valve seat 19 between the passage 14 and the orifice 18, and a valve rod 20 is screw threaded into the burner body to cooperate with said valve seat and control the flow offuel to the orifice 1 8. The valve rod is actuated by ahand wheel 21. i

At its top, the support 1 is provided with an extension 22 having an opening 23 therethrough in axial alinement with the orifice 18. The extension 22 has a flange 24 (see Figure 3) over which telescopes one end of a combustion tube 25 which is provided with diametrically opposite slots 26 to fit over the preheating tube 5. The interior of the combustion tube is provided with lugs 27 5.' having screw threaded openings. These lugs 27 abut the side of the flange 24 opposite the burner body, and the screw threaded openings receive screws 28 which pass through notches 29 in the flange 24 and have their heads disposed at the opposite of the flange from the lugs 27. In this manner the combustion tube is separably secured to the support 1.

In operation of the torch, the fuel is supplied from the pipe C to the preheating tube 5, where the fuel is initially vaporized by the burning of a small quantity of fuel in a preheating cup 30. The vaporized fuel passes through the preheating tube to the orifice of the burner block 17, and flow of the fuel is controlled by the valve 20. The fuel is ignited at the orifice and the flame passes through the opening 23 in the support into contact with and around the fuel preheating tube 5 in which the fuel is continuously vaporized. Vhen the interior of the preheating tube becomes clogged with carbon deposits, the handle 10 on the rod 6 is rotated and reciprocated :which causes the 130 spring 9 to rub against or scrape over the inner walls of the preheating tube so as to dislodge particles of carbon. Some of these particles will be blown through the burner orifice 18 and burned. Should large par .35 ticles be dislodged, they may be removed by unscrewing the gland nut 7 and removing the spring 9, after which the carbon particles can be shaken from the open end of the preheating tube.

The whole burner head is compact and slmple, and can be kept in good operating condition for a long period of time.

Preferably a hood E is secured overthe burner body 13 and. the space between the burner block and the combustion tube, to

protect the burner body against injury and deflect wind from striking the flame at the burner block.

While we have shown and described the '50 invention as embodied in certain details. of

construction, it should be understood that th1s is primarily for the purpose of illustrating. the principles of the invention, and that. many modifications and changes may .55 be made in the details of construction, by

those. skilled in the art, without departing from the spirit and scope of the invention.

Having thus described the invention, What we claim is:

.60 1; In a burner head for a plumbers torch,

.' ber and communicating with one end of said second passage, a burner on the other end of said preheating tube, a helical spring in said preheating tube, and means projecting from the other end of said second passage for moving said spring in said preheating tube to scrape the walls of the latter.

2. In a burner head for a plumbers torch, a member having a fuel passage therein and a second passage therethrough communicating with said fuel passage, a fuel preheating tube having one end connected to said member and communicating with one end of said second passage, a burner on the other end of said preheating tube, a helical spring in said preheating tube, and means projecting from the other end of said second passage for both rotating and reciprocating said spring in said preheating tube.

3. In a burner head for a plumbers torch, a member having a fuel passage therein and a second passage therethrough communicating with said fuel passage, a fuel preheating tube having one end connected to said member and communicating with one end of said second passage, a burner on the other end of said preheating tube, a device movable in said preheating tube to scrape the inner walls thereof, and means exterior of said tube for moving said device therein.

4. In a burner head for a plumbers torch,

a member having a fuel passage therein and a second passage therethrough communicating with said fuel passage, a substantially U-shaped fuel preheating tube disposed in the plane of said support and having one end connected to said member and communicating with one end of said second passage, a burner on the other end of said preheating tube, a helical spring in said preheating tube, and means projecting from the other end of said second passage for moving said spring in said preheating tube to scrape the walls of the latter.

5. In a burner head for a plumbers torch, a member having a fuel passage therein and a second passage therethrough communicating with said fuel passage, a fuel preheating tube having one end, connected to said member and communicating with one end of said second passage, a burner on the other end of said preheating tube, a helical spring in said preheating tube, and a rod connected to one end of said spring and rotatable and slidable in the other end of said second passage and projecting from one end thereof for rotating and reciprocating said spring.

6. In a burner head for a plumbers torch, a support having a fuel passage the-rein opening through one side thereof, said support also having an extension on its top, a substantially U-shaped fuel preheating tube mounted on said support in substantially an axial plane thereof having a loop between its ends and communicating at one end with said passage, said extension of said support being disposed between the arms of said pra heating tube, a burner connected to the other end of said preheating tube with its outlet orifice directed toward the loop of and in the same plane as said U-shaped tube and midway between its arms, and a combustion tube fitted over said tube from the loop end thereof and secured at its inner end to said extension of the support.

7. In a burner head for a plumbers torch, a support having a fuel passage therein opening through one side thereof, said support also having an extension on its top, a substantially U-shaped fuel preheating tube mounted on said support in substantially an axial plane thereof and communicating at one end with said passage, saideXtens-ion of said support being disposed between the arms of said preheating tube, a burner connected to the other end of said preheating tube with its outlet orifice directed toward the loop of and in the same plane as said U-shaped tube and midway between its arms, a combustion tube fitted over said preheating tube from the loop end thereof and formed with diametrically opposite slots to receive the arms of said preheating tube, said combustion tube having lugs at the end thereof adjacent said extension of the support, and

fastening members passing through said extension of said support and said lugs to secure said combustion tube on said support.

WILLIAM BERNZ. J. EDWARD FLITCROFT. 

